657120253 has 4 divisors (see below), whose sum is σ = 657230688. Its totient is φ = 657009820.

The previous prime is 657120221. The next prime is 657120257. The reversal of 657120253 is 352021756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 657120253 - 2⁵ = 657120221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657120257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45751 + ... + 58372.

It is an arithmetic number, because the mean of its divisors is an integer number (164307672).

Almost surely, 2^657120253 is an apocalyptic number.

It is an amenable number.

657120253 is a deficient number, since it is larger than the sum of its proper divisors (110435).

657120253 is a wasteful number, since it uses less digits than its factorization.

657120253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110434.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 657120253 is about 25634.3568868033. The cubic root of 657120253 is about 869.3906214044.

The spelling of 657120253 in words is "six hundred fifty-seven million, one hundred twenty thousand, two hundred fifty-three".